2 Samuel 1:13-16 - David Orders The Amalekite Killed
13 Then said David unto the young man that brought him tidings, "Whence art thou?" And he said, "I am the son of an alien, an Amalekite."
14 And David said unto him, "How is it that thou wast not afraid to lay thine hand on the LORD's anointed, to destroy him?" 15 And David called one of his young men, and said, "Go and run upon him." And he smote him that he died. 16 Then said David unto him, "Thy blood upon thine own head; for thine own mouth hath testified against thee, saying, 'I have slain the LORD's anointed.'"